alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Storm Worm HTTP Request"; flow:established,to_server; content:"GET"; http_method; content:"/?"; http_uri; pcre:"/GET \/\?[0-9a-f]{16}/Ui"; pcre:"/Host\x3a [0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}/i"; classtype:trojan-activity; sid:2006411; rev:9; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)